OMG Dick! Congrats on 1000 posts! :) :!) Haha..
Anyways.. you're right.. I was using the constant pressure equation (boy, do I feel stupid.. although I already do after putting the wrong T in the first post).. ok.. I totally understand now.. I think.. here's my work -
After I get m =...
Dick and Denver! Thanks so much for responding! I really appreciate it...
For 1).. I accidentally put in T1! Oops!
P2 = P1*T2/T1 = 200kPa*303K/323K = 187.62kPa
So it should be (187.62kPa*0.7m^3)/(0.287kJ/kg-K*303K) = 1.51kg.
2)
Do you mean the equation s2-s1=C*ln(T2/T1)? I have that...
Thanks chemisttree for your response!
For 1).. I accidentally put in T1! Oops!
P2 = P1*T2/T1 = 200kPa*303K/323K = 187.62kPa
So it should be (187.62kPa*0.7m^3)/(0.287kJ/kg-K*303K) = 1.51kg.
However.. isn't 0.287kJ/kg-K correct since it's the R for air? :\ Not R-bar or anything else.
I think I may have posted this in the wrong forum earlier :\
Homework Statement
An insulated and initially empty 0.7m^3 tank is connected by a valve to a line flowing air at 50degreesC and 200kPa. The valve is opened until the tank is filled, and then the valve is closed. The insulation is...
Homework Statement
An insulated and initially empty 0.7m^3 tank is connected by a valve to a line flowing air at 50degreesC and 200kPa. The valve is opened until the tank is filled, and then the valve is closed. The insulation is then removed from the tank, and a 20degreeC heat sink cools the...